Tucson air quality at unhealthful levels due to wind

Pima County’s air quality has reached unhealthful levels, thanks to high winds and blowing dust.

Mining concern to pay $60K fine for Marana spill

An Asarco mining operation has agreed to pay a $60,000 fine and take preventive steps valued at $50,000 to resolve water-quality violations caused by a June 2010 pipeline spill at the Silver Bell Copper Mine near Marana, state regulators said Tuesday.

US tightens air-quality rule for soot emissions

WASHINGTON - In its first major regulation since the election, the Obama administration on Friday imposed a new air quality standard that reduces by 20 percent the maximum amount of soot released into the air from smokestacks, diesel trucks and other sources of pollution.

Autism linked to early exposure to traffic pollution

LOS ANGELES — In a finding that points to a link between environmental toxins and autism, a new study shows that children who were exposed to the highest levels of traffic-related air pollution during gestation and in early infancy were three times more likely to be diagnosed with the neurod…

DEQ sues over Nogales sewer discharges

PHOENIX - State officials want to force a federal agency to stop dumping sewage loaded with heavy metals into the Santa Cruz River.

State, utilities fight EPA plan to reduce power-plant haze

Arizona Public Service said it may be forced to close down one of the units at its Cholla power plant near Holbrook if the EPA rules go into effect.

Arizona, utilities fight EPA plan to reduce power-plant haze

PHOENIX - State officials and utilities are trying to kill a plan by the U.S. Environmental Protection Agency to force owners of three coal-fired power plants to install expensive pollution-control equipment to improve visibility.

Air quality advisory issued for Tucson

Another air quality advisory was issued today by the Pima County Department of Environmental Quality because of the elevated levels of smoke and ground-level ozone.